Path: utzoo!utgpu!watserv1!watmath!uunet!lll-winken!uwm.edu!cs.utexas.edu!asuvax!mcdphx!mcdchg!chinet!les
From: les@chinet.chi.il.us (Leslie Mikesell)
Newsgroups: unix-pc.general
Subject: Re: bsplit?
Message-ID: <1990Feb3.045134.26715@chinet.chi.il.us>
Date: 3 Feb 90 04:51:34 GMT
References: <12897@cbnewsc.ATT.COM> <26143@cup.portal.com> <1990Jan23.040408.27311@banzai.PCC.COM>
Reply-To: les@chinet.chi.il.us (Leslie Mikesell)
Organization: Chinet - Chicago Public Access UNIX
Lines: 30

In article <1990Feb1.232040.26182@cs.rochester.edu> ken@cs.rochester.edu writes:
>> 		for i in 1 2 3 4 5
>> 		do
>> 			dd bs=10k count=1 of=part$i
>> 		done < foo
>
>Another approach would be to precompute the number of parts
>needed and generate fixed width numbers by prepadding with zeros, then
>trimming to the final width with sed.

The fixed width numbers are easy with something like: (3 digits)
case $i in
 ?)
  i=00$i
 ;;
 ??)
  i=0$i
 ;;
esac

The real problem, though is that you can't feed the script from a
pipe.  dd is almost unique among the unix tools in that it
uses read() rather than fread() and will fail to read the
requested amount if the input pipeline cannot stay ahead.

>No doubt somebody will suggest a perl version next. :-)
Good idea...
 
Les Mikesell
  les@chinet.chi.il.us